The Backup in a Box is the mains water backup unit used in Direct Feed Systems.
This system guarantees water will be available to appliances in times of drought when the Rainwater tank is empty. The system uses a level sensor inside the tank to open a solenoid valve within the control unit when water reaches a critical level.
When the tank level triggers the level sensor, the PCB board allows 45 minutes of mains water restricted to 4 litres per minute (180 litres) to enter the tank once the float switch has reached the full position.
U.K. Building Regulations require that rainwater cannot possibly flow back into the mains water supply, this is also starting to become regulation in many other countries.
For this reason all mains backup devices must have an air gap where the mains water flows into the rainwater tank. The air gap in this system is an anti-splash tundish and overflow incorporated into one. The transparent clear moulded part. The level sensor is provided with 20 metres of cable and uses a push connection under the right hand panel.
The Rain Backup in a Box® should be fitted inside the building where the occupiers can (when rainwater has run out) hear any mains water running from the solenoid valve. Wall mounting is with screws through holes in the back of the control unit.
Unit Size : 380mm (W) x 270mm (H) x 95mm (D)
